Two Channel Relay Board

2 channel Relay driver project can be controlled by feeding 2-12V trigger voltage, Very useful project for application like Micro-Controller based projects, Remote controller, Lamp on Off, and any circuits which required isolated high current and high voltage switching by applying any TTL or CMOS level voltage. Two LED works as operation indicator while in , 3 pins screw terminals

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LED VU Meter 5LEDs CH1403 or LB1403 IC

5 LED VU Meter project is based on LB1403/CH1403 IC from SANYO, which will indicates the volume level of the audio signal it senses. Features  Power supply : 6 to 12 VDC @ 90 mA Lighting levels remain stable to line regulation because of on-chip voltage reference LED’s are driven by a constant current Onboard presets to adjust input sensitivity

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Tiny Mic Pre-Amplifier

The Tiny Mic Pre-Amplifier project is based on a single transistor.  It amplifies the output of the electret condenser microphone. The project amplify low level signal coming from microphone and then provide sufficient voltage level to drive power audio amplifier. Good choice for Karaoke. Power supply : 5 ~ 9 VDC @ 2 mA PCB dimensions 26 mm x 56

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Mini Stereo Audio Amplifier TDA2822

Mini Stereo Audio Amplifier project is designed for portable radio players and other building block projects.  It is based on TDA2822 IC. Features  Power supply : Upto 12 VDC  Output : 1 W, 8 ?  for 12 VDC / 20 mW, 32 ? for 3 VDC  Input resistance 100 K?  Low crossover distortion, Low quiescent current  Berg connector for connecting

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